A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor

Details A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.7902f&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #79.02; Bulletin of the American Astronomical Society, Vol. 30, p.1372

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the detection by the Gamma Ray Burst Monitor on board of BeppoSAX of the strongest and longest ever detected outburst from SGR 1900+14. This event, first reported by Cline et al. (1998), is characterized by a sharp rise ( 1s) to a peak emission lasting 2s, and by a fast quasi-exponential decay, followed by a slower exponential longer decay phase. Oscillations are detectable with a period of 5.16-s for the entire duration of the event. A fine temporal analysis reveals a remarkable periodic substructure: after about 35s from the event onset each 5.16-s pulse showed a pattern of four subpulses of period 1s. No apparent relative phase variations or subpulse damping were observed in the oscillations for about 100s. Strong spectral evolution is detected across the event and for each individual oscillation. The first and most intense part of the outburst is quite hard, and similar to what previously detected from the strong outburst of the `March 5th event', SGR0525-66. The measurement of the 5.16-s period (Hurley et al. 1998) and of its period derivative (Kouveliotou et al. 1998) support the interpretation of SGR1900+14 as a strongly magnetized neutron star (magnetar) with B >10(14) G undergoing a violent instability by either internal or crustal magnetic stresses. However, the coexistence of two apparent periodicities at about 5 and 1s and the observed spectral evolution, challenge current SGR models.

Affiliated with

Also associated with

No associations

Rating

A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-996688